At present day there are several different methods for measuring of paved surfaces. The most common methods today are measuring with a total station, the Global Navigation Satellite System (GNSS) and terrestrial laser scanning (TLS). Recently the development of unmanned aerial vehicles, known as drones, has increased exponentially and today there are several ways of using drones for measuring surfaces by photographing and laser scanning. This thesis contains a comparison between the methods terrestrial laser scanning (TLS), and unmanned aerial vehicle photogrammetry (UAV). The measurements have been applied on two different test surfaces, one of asphalt and one of gravel. The purpose of the comparison is to investigate whether the airborne photogrammetry is equivalent accurate in its height levels as the terrestrial laser scanning. For the comparison to be more extensive, these two methods have not only been compared in precision but also in the areas of ease of use and economy. The precision was analyzed by comparing the height levels in randomly placed control points on the test surfaces. This has been made possible by the creation of terrain models of test surfaces in the software Geo where a surface scan of the models have been implemented. With the help of surface control the height deviations in the control points have been calculated and from these deviations the precision of the airborne photogrammetry has been evaluated. The ease of use has been analyzed based on observations made and information gathered from experienced consultants for each technology. For the economic aspect the costs for each measurement method has been presented to get an overall picture of each measurement method costs. The work has been carried out on behalf of the consulting firm Bjerking AB. The goal is to be able to provide Bjerking with a recommendation for which technology is best suited for measuring of paved surfaces. The results of the survey show that the UAV varies by a mean of 11 mm on the surface of gravel and 2 mm on the surface of the asphalt. The final recommendation given is that the UAV is preferred for measurement of asphalt roads, because since the precision is equivalent to TLS, the method is safe
| Identifer | oai:union.ndltd.org:UPSALLA1/oai:DiVA.org:uu-257679 |
| Date | January 2015 |
| Creators | Cedergren, Lucas, Paakkonen, Richard |
| Publisher | Uppsala universitet, Byggteknik, Uppsala universitet, Byggteknik |
| Source Sets | DiVA Archive at Upsalla University |
| Language | Swedish |
| Detected Language | English |
| Type | Student thesis, info:eu-repo/semantics/bachelorThesis, text |
| Format | application/pdf |
| Rights | info:eu-repo/semantics/openAccess |
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